Sig Sauer P320 Cal-X 320-M17 X-Change Kit
Best modular upgrade for P320 owners seeking a military-style configuration.
This conversion kit is the fastest route to military-grade modularity, letting you swap your existing setup into a battle-proven configuration in seconds. You sacrifice the customizability of a ground-up build, but you gain a seamless, factory-perfect transformation that includes the optics-ready slide and extra capacity needed for serious range work.
$437.99
at
EuroOptic
Who it's for
- P320 owners seeking a cost-effective platform upgrade
- Shooters wanting the iconic military-grade M17 aesthetic
- Range enthusiasts needing extra high-capacity magazine storage
Who should skip it
- New buyers without an existing serialized FCU
- Budget-conscious shoppers comparing against complete pistol prices
- Everyday carriers needing a compact, concealable firearm
Performance breakdown
Installation simplicity
Drop-in design makes converting your existing fire-control unit incredibly straightforward.
Optics compatibility
Dedicated SIG-LOC footprint offers a secure, low-profile mount for specific optics.
Build quality
Factory OEM components ensure the same durability as standard military-issue hardware.
Magazine capacity
Generous inclusion of two extended 21-round magazines adds significant tactical value.
Sighting system
SIGLITE night sights provide reliable, high-contrast aiming in low-light environments.
Finish durability
Coyote-tan PVD coating offers excellent resistance against wear and harsh elements.
Key Specs
SKU
CALX-M17-CSS-MS-Sig Sauer
UPC
798681723959
MPN
CALX-M17-CSS-MS
Caliber
9mm
Package Includes
Slide assembly (4.7″ M17 slide), 4.7″ barrel & recoil spring assembly, carry‑length coyote grip module, and magazines: (1) 17‑round magazine and (2) 21‑round extended magazines
Sights
SIGLITE front night sight and removable night‑sight rear plate
Slide Finish
Coyote‑tan PVD (Coyote finish on slide / kit hardware)
Item Condition
New
Product Type
Caliber Exchange Kit
Know before you buy
Still have a question?
Ask Metto anything about the Sig Sauer P320 Cal-X 320-M17 X-Change Kit before you decide.
